diff --git a/sdk/metric/meter_test.go b/sdk/metric/meter_test.go
index f78e73659c0..4fea8fccf90 100644
--- a/sdk/metric/meter_test.go
+++ b/sdk/metric/meter_test.go
@@ -755,6 +755,9 @@ func TestValidateInstrumentName(t *testing.T) {
 			name:    "1",
 			wantErr: fmt.Errorf("%w: 1: must start with a letter", ErrInstrumentName),
 		},
+		{
+			name: "a",
+		},
 		{
 			name: "n4me",
 		},